diff --git a/client/src/lib/game-implementations.tsx b/client/src/lib/game-implementations.tsx
index 648276103..07aa0b4eb 100644
--- a/client/src/lib/game-implementations.tsx
+++ b/client/src/lib/game-implementations.tsx
@@ -209,6 +209,12 @@ export const GPT_CLIENT_IMPLEMENTATIONS: GPTClientImplementations = {
 				SHINDAN_10: bg("purple"),
 
 				SHINKAIDEN: bg("purple"),
+
+				URAKAIDEN: {
+					background:
+						"linear-gradient(-45deg, #f0788a, #f48fb1, #9174c2, #79bcf2, #70a173, #f7ff99, #faca7d, #ff9d80, #f0788a)",
+					color: "black",
+				},
 			},
 			colour: {
 				WHITE: bgc("white", "black"),
diff --git a/common/src/config/game-support/maimai-dx.ts b/common/src/config/game-support/maimai-dx.ts
index 65aad4ac9..6f14bb64b 100644
--- a/common/src/config/game-support/maimai-dx.ts
+++ b/common/src/config/game-support/maimai-dx.ts
@@ -37,6 +37,8 @@ const MaimaiDXDans = [
 	ClassValue("SHINDAN_10", "真十段", "10th Shindan"),
 
 	ClassValue("SHINKAIDEN", "真皆伝", "Shinkaiden"),
+
+	ClassValue("URAKAIDEN", "裏皆伝", "Urakaiden"),
 ];
 
 const MaimaiDXColours = [
diff --git a/docs/docs/game-support/games/maimaidx-Single.md b/docs/docs/game-support/games/maimaidx-Single.md
index 2bed457e7..33d06c26c 100644
--- a/docs/docs/game-support/games/maimaidx-Single.md
+++ b/docs/docs/game-support/games/maimaidx-Single.md
@@ -81,7 +81,7 @@ The default rating algorithm is `naiveRate`.
 | Name | Type | Values |
 | :: | :: | :: |
 | `colour` | DERIVED | WHITE, BLUE, GREEN, YELLOW, RED, PURPLE, BRONZE, SILVER, GOLD, PLATINUM, RAINBOW
-| `dan` | PROVIDED | DAN_1, DAN_2, DAN_3, DAN_4, DAN_5, DAN_6, DAN_7, DAN_8, DAN_9, DAN_10, SHINDAN_1, SHINDAN_2, SHINDAN_3, SHINDAN_4, SHINDAN_5, SHINDAN_6, SHINDAN_7, SHINDAN_8, SHINDAN_9, SHINDAN_10, SHINKAIDEN
+| `dan` | PROVIDED | DAN_1, DAN_2, DAN_3, DAN_4, DAN_5, DAN_6, DAN_7, DAN_8, DAN_9, DAN_10, SHINDAN_1, SHINDAN_2, SHINDAN_3, SHINDAN_4, SHINDAN_5, SHINDAN_6, SHINDAN_7, SHINDAN_8, SHINDAN_9, SHINDAN_10, SHINKAIDEN, URAKAIDEN
 
 ## Versions